> ## Documentation Index > Fetch the complete documentation index at: https://docs.eachlabs.ai/llms.txt > Use this file to discover all available pages before exploring further. # Run Model Prediction Synchronously > Create a prediction and wait for the result. This compatibility endpoint is only supported for models with synchronous execution enabled; unsupported models return a bad request error. ## OpenAPI ````yaml /openapi_specs/models.json post /v1/prediction/run openapi: 3.0.3 info: title: each::labs Official API v1 description: > Official each::labs API V1. This API provides access to our comprehensive AI model catalog and other resources. ## Public contract notes - Public API routes handled by request logging include `X-Request-Id` for support and log correlation. Clients may send `X-Request-Id`; otherwise api-service generates one. Root, health, and metrics endpoints are excluded. - REST error bodies keep the backward-compatible JSON shape used by existing clients. Most errors include at least `error`; some shared error paths also include `status` and `details`. Use the HTTP status code as the primary programmatic signal unless an endpoint documents a richer envelope. - Rate-limit and retry headers are endpoint-dependent. If a response includes `Retry-After`, honor it before retrying; otherwise use bounded exponential backoff for retryable 429/5xx responses. - api-service exposes single workflow trigger through `/v1/workflows/trigger/{workflowID}/{versionID}`. Bulk workflow trigger is not routed through api-service; use the workflows-engine public API directly where bulk trigger is required. version: 1.0.0 contact: name: API Support email: support@eachlabs.ai x-logo: url: ./logo-white.svg altText: each::labs servers: - url: https://api.eachlabs.ai description: Production server security: [] tags: - name: AI Models description: Endpoints for listing and retrieving AI models and other resources. - name: AI Models Prediction description: Endpoints for managing model predictions - name: Uploads description: Endpoints for uploading files that can be used as model inputs. - name: Executions description: Endpoints for listing execution history. - name: Workflows description: Endpoints for triggering workflow executions through api-service. - name: OpenAI Compatibility description: OpenAI-compatible endpoints for LLM Router requests. - name: Webhooks description: > Endpoints for retrieving webhook information and delivery history. **Note:** Currently, webhooks are only supported for Workflows V2. We are actively expanding webhook support to other services and will update this documentation as new integrations become available. paths: /v1/prediction/run: post: tags: - AI Models Prediction summary: Run Model Prediction Synchronously description: > Create a prediction and wait for the result. This compatibility endpoint is only supported for models with synchronous execution enabled; unsupported models return a bad request error. operationId: runPrediction requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CreatePredictionRequest' example: model: eachlabs-llm-router input: model: openai/gpt-4o-mini messages: - role: user content: Write a one sentence caption. responses: '200': description: Prediction completed or failed synchronously content: application/json: schema: $ref: '#/components/schemas/RunPredictionResponse' example: status: success message: Prediction completed successfully predictionID: abc123-def456-ghi789 output: text: A cinematic sunset over the ocean. error: '' '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '422': $ref: '#/components/responses/UnprocessableEntity' '500': $ref: '#/components/responses/InternalServerError' security: - ApiKeyAuth: [] components: schemas: CreatePredictionRequest: type: object required: - model - input properties: model: type: string description: Model slug or identifier example: flux-1-1-pro version: type: string deprecated: true description: Deprecated. This field is ignored. Kept for backwards compatibility. example: 0.0.1 input: type: object description: Input parameters for the prediction additionalProperties: true example: prompt: A beautiful sunset over the ocean with vibrant colors aspect_ratio: '16:9' webhook_url: type: string format: uri description: Optional webhook URL to receive prediction result asynchronously example: https://your-app.com/webhook webhook_secret: type: string description: Optional secret used to sign webhook requests example: your-secret-key RunPredictionResponse: type: object properties: status: type: string enum: - success - failed - cancelled description: Final terminal status of the synchronous prediction example: success message: type: string description: Human-readable message example: Prediction completed successfully predictionID: type: string description: Unique prediction identifier example: abc123-def456-ghi789 output: description: Prediction output, when available nullable: true oneOf: - type: string - type: array - type: object error: type: string description: User-facing error message when the prediction failed example: '' Error: type: object description: > Backward-compatible REST error body. Endpoint-specific handlers may return only `error`; shared error paths may also include `status` and `details`. properties: status: type: integer description: HTTP status code, when returned by the shared error handler. example: 400 error: type: string description: Safe user-facing error message. example: error message details: nullable: true description: Optional validation or request details for client errors. required: - error responses: BadRequest: description: Bad request headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: slug parameter is required Unauthorized: description: Authentication required or invalid credentials headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: Invalid or missing API key UnprocessableEntity: description: Request body could not be processed headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: invalid request body InternalServerError: description: Internal server error headers: X-Request-Id: $ref: '#/components/headers/RequestId' content: application/json: schema: $ref: '#/components/schemas/Error' example: error: 'Failed to fetch models: internal error' headers: RequestId: description: >- Request correlation ID. Echoes the incoming `X-Request-Id` header or a generated ID. schema: type: string example: 123e4567-e89b-12d3-a456-426614174000 securitySchemes: ApiKeyAuth: type: apiKey in: header name: X-API-Key description: API key for authentication ````